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A Borane Platinum Complex Undergoing Reversible Hydride Migration in Solution.

Abdollah Neshat1, Hamid R Shahsavari1, Piero Mastrorilli2

  • 1Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS) , Zanjan 45137-66731, Iran.

Inorganic Chemistry
|January 17, 2018
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Summary
This summary is machine-generated.

This study reports a new platinum complex with a strong platinum-boron bond. The complex undergoes reversible platinum-hydride bond activation in solution, forming a platinum(II,II) dimer upon hydrolysis.

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Area of Science:

  • Organometallic Chemistry
  • Coordination Chemistry
  • Materials Science

Background:

  • Platinum complexes are crucial in catalysis and materials science.
  • Understanding metal-ligand interactions is key to designing new functional materials.
  • The reactivity of platinum(II) complexes with boron-containing ligands is an area of active research.

Purpose of the Study:

  • To synthesize and characterize novel platinum complexes with 2-mercapto-benzimidazole ligands.
  • To investigate the structural features and reactivity of these complexes, particularly the Pt-B interaction.
  • To explore the potential for Pt-H bond activation and subsequent hydrolysis.

Main Methods:

  • Synthesis of platinum complexes using [Pt(κ²-C,N-ppy)(dmso)Cl] and Na[H₂B(mb)₂].
  • Characterization using single-crystal X-ray diffraction (SC-XRD) and multinuclear NMR spectroscopy.
  • Investigation of solution-state equilibria and hydrolysis reactions.

Main Results:

  • A novel hexacoordinated platinum(II) complex, {[(κ³-S,B,S-HB(mb)₂]Pt(κ²-C,N-ppy)H} (2), was synthesized, featuring a strong reverse-dative Pt → B σ interaction.
  • Complex 2 undergoes reversible Pt-H bond activation in solution, forming a tetracoordinate complex, {[(κ²-S,S-H₂B(mb)₂]Pt(κ²-C,N-ppy)} (3).
  • Hydrolysis of complex 2/3 leads to the formation of a dimeric half-lantern platinum(II,II) complex, [{Pt(κ²-C,N-ppy)(μ₂-κ²-N,S-mb)}₂] (4).

Conclusions:

  • The study demonstrates the successful synthesis and characterization of unique platinum complexes with a Pt-B interaction.
  • Reversible Pt-H bond activation and subsequent hydrolysis pathways were elucidated.
  • The findings contribute to the understanding of platinum complex reactivity and the development of novel platinum-based materials.